The Research On Solid Waste In The Application Of Concrete Filled Steel Tube As Well As Its Characteristics

For a long time,the economic development model in our country isresource-consuming,at the same time,our country is in a period ofincreasingly-growing economic development, industrial production will producemore and more solid waste,such as waste glass,waste rubber,and municipal solidwaste incinerator ash.Therefore,it has a very important practical significance forresource conservation and environmental protection in our country to recyclethese solid waste.Getting waste glass used in CFST,on the one hand,steel tube will provideconfining force for the core concrete,and will improve the bond between theglass and the cement to prevent the slip due to ASR,on the other hand,to someextent,the expansive force caused by ASR just will compensate for shrinkagestress in the core concrete,so waste glass can will be fully utilized.In thisthesis,through the test of glass CFST,axial load bearing capacity of the statictheoretical analysis and finite element software ABAQUS simulation,weobtained that ASR expansion in the glass CFST has beneficial effects to theimprovement of the load capacity of CFST.Getting waste rubber used in CFST, steel tube will provide confining forcefor the core concrete,and will improve the poor compatibility between the rubberparticles and cement,at the same time,due to the deformation properties of therubber particles,the dynamic performance of CFST will be improved.In thisthesis,through the test of rubber CFST,axial load bearing capacity of the statictheoretical analysis and finite element software ABAQUS simulation,weobtained that,compared with ruber concrete,the load capacity of rubber CFST hasbeen improved,and also is the dynamic performance of the flexure andcompression component.Getting incinerarion ash used in CFST,on the one hand,steel tube willprovide confining force for the core concrete,and make the link more closely,onthe other hand,the core concrete is in sealed environment,as a result of lack of moisture and oxygen,so the chloride ion in the incinerarion ash is restricted tocorrode steel tube in sealed environment.In this thesis,through the test ofincineration ash CFST,axial load bearing capacity of the static theoreticalanalysis,finite element software ABAQUS simulation and the analysis of thecorrosion reaction from the chloride ion in numerical simulation softwareCOMSOL Multiphysics,we obtained that,only need simple treatment,theincineration ash can be directly applied to the CFST,almost no steel pipecorrosion from chloride ion and adverse influence to the surroundingenvironment,but also will get relatively good requirements of the load capacity.